CN110153390A - It makes steel crystallizer steel -passing amount and deepens steel index control method - Google Patents
It makes steel crystallizer steel -passing amount and deepens steel index control method Download PDFInfo
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- CN110153390A CN110153390A CN201910495264.1A CN201910495264A CN110153390A CN 110153390 A CN110153390 A CN 110153390A CN 201910495264 A CN201910495264 A CN 201910495264A CN 110153390 A CN110153390 A CN 110153390A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/08—Accessories for starting the casting procedure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/22—Controlling or regulating processes or operations for cooling cast stock or mould
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- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The present invention relates to crystallizer technology fields, and disclose steel-making crystallizer steel -passing amount in-depth steel index control method, the following steps are included: the control technology and equipment of cold water matter pH value index and conductivity indices, including water tower and monitor terminal, the inside of water tower is equipped with water quality monitor, and water quality monitor directly contacts with the cold water in water tower and carries out real-time monitoring;Cold water matter pH value index control method, water quality monitor carry out real-time monitoring to cold water matter pH value.The steel-making crystallizer steel -passing amount deepens steel index control method, has the advantages that heel and toe wear for ensuring heat transfer efficiency and reducing copper pipe coating, solves the service life that continuous cast mold steel -passing amount determines copper pipe, production cost can be reduced by promoting copper pipe steel -passing amount, the replacement frequency of crystallizer is reduced simultaneously, and increase changes the packet equipment repair and maintenance time and reduces personnel labor intensity, the maximum yield for promoting steel mill, stablize STEELMAKING PRODUCTION tissue, still there is the problem of room for improvement.
Description
Technical field
The present invention relates to crystallizer technology field, specially a kind of steel-making crystallizer steel -passing amount deepens steel norm controlling side
Method.
Background technique
" heart " of the continuous cast mold as conticaster is to ensure that continuous casting direct motion and stable important of slab quality are set
Standby, with the development of technology and progress, raising crystallizer copper tube lifetime can effectively reduce copper pipe consumption, therefore, carry out crystallizer
Copper pipe steel -passing amount Study of Lifting reduces cost and improves steel mill yield being of great significance to steady production and quality.
Chinese patent CN201310104332.X discloses a kind of conticaster crystallizer on-line operation decision-making system, this method
It is online to determine whether conticaster crystallizer is in optimal operational condition, to guarantee surface quality of continuously cast slab, continuous casting crystallining at present
Device steel -passing amount determines the service life of copper pipe, and production cost can be reduced by promoting copper pipe steel -passing amount, while reduce crystallizer more
Frequency is changed, increase changes the packet equipment repair and maintenance time and reduces personnel labor intensity, and the maximum yield for promoting steel mill is stablized
STEELMAKING PRODUCTION tissue still has room for improvement, so propose a kind of steel-making crystallizer steel -passing amount in-depth steel norm controlling side
Method.
Summary of the invention
(1) the technical issues of solving
In view of the deficiencies of the prior art, the present invention provides a kind of steel-making crystallizer steel -passing amounts to deepen steel norm controlling side
Method has the advantages that heel and toe wear for ensuring heat transfer efficiency and reducing copper pipe coating, solves continuous cast mold steel -passing amount and determine
The service life of copper pipe is determined, production cost can be reduced by promoting copper pipe steel -passing amount, while reduce the replacement frequency of crystallizer, be increased
It changes the packet equipment repair and maintenance time and reduces personnel labor intensity, the maximum yield for promoting steel mill stablizes STEELMAKING PRODUCTION group
It knits, still there is the problem of room for improvement.
(2) technical solution
For the purpose for realizing the above-mentioned heel and toe wear for ensuring heat transfer efficiency and reducing copper pipe coating, the present invention provides as follows
Technical solution: steel-making crystallizer steel -passing amount deepens steel index control method, comprising the following steps:
1) control technology and equipment of cold water matter pH value index and conductivity indices, including water tower and monitor terminal, water tower
Inside be equipped with water quality monitor, water quality monitor directly contacts with the cold water in water tower and carries out real-time monitoring;
2) cold water matter pH value index control method, water quality monitor carry out real-time monitoring to cold water matter pH value, set in water tower
There is the input pipe for extending to cold water, carries out adjustment to pH value by the way that suitable corrosion inhibiter is added to input pipe inside;
3) inside of the conductivity indices control method of cold water matter, water tower is equipped with Conductivity controllers, water quality monitor pair
The conductivity of cold water matter carries out real-time monitoring, and cold water information is transmitted to monitor terminal by water quality monitor, eventually by control monitoring
End controls Conductivity controllers, adjusts the conductivity of cold water;
4) dummy bar running track controls, and bearing is installed in the outside activity of dummy bar, and the outer sheath of dummy bar is equipped with and axis
The stop collar of touching is accepted, stop collar follows the braking equipment of dummy bar to move horizontally together, the mistake that dummy bar relies on motor mobile
By the limit of stop collar in journey, the movement deviation of dummy bar can be reduced;
5) optimize crystallizer copper pipe coating and taper, increase copper tube inner lining coating, and optimize copper pipe parameter, it is anti-to increase copper pipe
Under the premise of abrasion, copper pipe resistance of billet withdrawal is controlled.
Preferably, water tower described in step 1 is crystallizer enclosed cooling column, and monitor terminal is manipulated by staff
Supervision.
Preferably, the scope of application of corrosion inhibiter described in step 2;Chromate is applicable in pH range 6.5~9.0, Quadrafos
It is applicable in pH range 6.0~7.0, chromate-zinc salt is applicable in pH range 6.5~7.5, the applicable pH range of molybdate 7.5~
10.0, silicate is applicable in pH range 7.5~10.0, cold water water quality indicator pH range 7.0~9.0.
Preferably, Conductivity controllers described in step 3 calculate temperature-compensating using single-chip microcontroller digitlization, have high and low limit
Control relay exports and the functions such as switching temperature is shown, is suitble to pure water manufacture, cooling water water tower.
Preferably, dummy bar described in step 4 rolls between moving process middle (center) bearing and stop collar, reduces stop collar and draws
Friction between spindle blade reduces the abrasion of dummy bar, prevents dummy bar size because abrasion changes, and causes to deviate, and guarantees to draw
The displacement error of spindle blade is in 5mm.
(3) beneficial effect
Compared with prior art, the present invention provides a kind of steel-making crystallizer steel -passing amounts to deepen steel index control method,
Have it is following the utility model has the advantages that
1, the steel-making crystallizer steel -passing amount deepens steel index control method, is referred to by cold water matter pH value index with conductivity
The inside of target control technology and equipment, including water tower and monitor terminal, water tower is equipped with water quality monitor, water quality monitor and water
Cold water in tower directly contacts and carries out real-time monitoring, and cold water matter pH value index control method, water quality monitor is to cold water matter PH
Value carries out real-time monitoring, is equipped with the input pipe for extending to cold water in water tower, by the way that suitable corrosion inhibiter is added to input pipe inside
The adjustment to pH value, the conductivity indices control method of cold water matter are carried out, the inside of water tower is equipped with Conductivity controllers, water quality prison
It surveys instrument and real-time monitoring is carried out to the conductivity of cold water matter, cold water information is transmitted to monitor terminal, passes through control by water quality monitor
Monitor terminal controls Conductivity controllers, adjusts the conductivity of cold water, the scope of application of corrosion inhibiter;Chromate is applicable in PH
It is worth range 6.5~9.0, Quadrafos is applicable in pH range 6.0~7.0, and chromate-zinc salt is applicable in pH range 6.5~7.5,
Molybdate is applicable in pH range 7.5~10.0, and silicate is applicable in pH range 7.5~10.0, by cold water water quality indicator pH value control
System is in the range of 7.0~9.0, and in 25C, the water of PH=7 is neutrality, thus the water of PH=7~9.2 generally belong to it is neutral or
Subalkaline range, in general, within the scope of above-mentioned PH, the corrosivity of cooling water declines with the rising of pH value, is following
In the operational process of ring cooling water, if being added without sulfuric acid, the pH value of cooling water can gradually rise to its natural equilibrium pH value,
Therefore, if cooling water needs to run under conditions of being lower than its natural equilibrium pH value, the pH value of the recirculating cooling water system
It needs to control by acid adding, it is ensured that while heat transfer efficiency, reduce the corrosivity of cooling water, it is ensured that the normal fortune of crystallizer
Row, to achieve the purpose that ensure heat transfer efficiency.
2, the steel-making crystallizer steel -passing amount deepens steel index control method, is controlled by dummy bar running track, dummy ingot
Bearing is installed in the outside activity of bar, and for the outer sheath of dummy bar equipped with the stop collar with bearing touch, stop collar follows dummy bar
Braking equipment moves horizontally together, and limit of the dummy bar by motor during mobile by stop collar can reduce dummy bar
Movement deviation, optimize crystallizer copper pipe coating and taper, increase copper tube inner lining coating, and optimize copper pipe parameter, increase copper pipe
Under the premise of wear-resistant, copper pipe resistance of billet withdrawal is controlled, the friction between stop collar and dummy bar is reduced, reduces the mill of dummy bar
Damage, prevents dummy bar size because abrasion changes, causes to deviate, guarantee the displacement error of dummy bar in 5mm, to reach
Reduce the purpose of copper pipe coating heel and toe wear.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical solution in the embodiment of the present invention is clearly and completely retouched
It states, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the present invention
In embodiment, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
Embodiment one: steel-making crystallizer steel -passing amount deepens steel index control method, comprising the following steps:
1) control technology and equipment of cold water matter pH value index and conductivity indices, including water tower and monitor terminal, water tower
Inside be equipped with water quality monitor, water quality monitor directly contacts with the cold water in water tower and carries out real-time monitoring;
2) cold water matter pH value index control method, water quality monitor carry out real-time monitoring to cold water matter pH value, set in water tower
There is the input pipe for extending to cold water, carries out adjustment to pH value by the way that suitable corrosion inhibiter is added to input pipe inside;
3) inside of the conductivity indices control method of cold water matter, water tower is equipped with Conductivity controllers, water quality monitor pair
The conductivity of cold water matter carries out real-time monitoring, and cold water information is transmitted to monitor terminal by water quality monitor, eventually by control monitoring
End controls Conductivity controllers, adjusts the conductivity of cold water;
4) dummy bar running track controls, and bearing is installed in the outside activity of dummy bar, and the outer sheath of dummy bar is equipped with and axis
The stop collar of touching is accepted, stop collar follows the braking equipment of dummy bar to move horizontally together, the mistake that dummy bar relies on motor mobile
By the limit of stop collar in journey, the movement deviation of dummy bar can be reduced;
5) optimize crystallizer copper pipe coating and taper, increase copper tube inner lining coating, and optimize copper pipe parameter, it is anti-to increase copper pipe
Under the premise of abrasion, copper pipe resistance of billet withdrawal is controlled.
Step 1 water tower is crystallizer enclosed cooling column, and monitor terminal carries out manipulation supervision by staff.
The scope of application of step 2 corrosion inhibiter;Chromate is applicable in pH range 6.5~9.0, and Quadrafos is applicable in pH range
6.0~7.0, chromate-zinc salt is applicable in pH range 6.5~7.5, and molybdate is applicable in pH range 7.5~10.0, and silicate is suitable
With pH range 7.5~10.0, cold water water quality indicator pH range 7.0~9.0.
Step 3 Conductivity controllers calculate temperature-compensating using single-chip microcontroller digitlization, have high and low limit control relay defeated
It the functions such as shows with switching temperature out, is suitble to pure water manufacture, cooling water water tower.
Step 4 dummy bar rolls between moving process middle (center) bearing and stop collar, reduces between stop collar and dummy bar
Friction, reduces the abrasion of dummy bar, prevents dummy bar size because abrasion changes, cause to deviate, guarantee the movement of dummy bar
Error is in 5mm.
Pass through the control technology and equipment of cold water matter pH value index and conductivity indices, including water tower and monitor terminal, water
The inside of tower is equipped with water quality monitor, and water quality monitor directly contacts with the cold water in water tower and carry out real-time monitoring, cold water matter
PH value index control method, water quality monitor carry out real-time monitoring to cold water matter pH value, are equipped in water tower and extend to the defeated of cold water
Enter pipe, carries out adjustment to pH value, the conductivity indices control of cold water matter by the way that suitable corrosion inhibiter is added to input pipe inside
Method, the inside of water tower are equipped with Conductivity controllers, and water quality monitor carries out real-time monitoring, water quality prison to the conductivity of cold water matter
It surveys instrument and cold water information is transmitted to monitor terminal, Conductivity controllers are controlled by controlling monitor terminal, adjust cold water
Conductivity, the scope of application of corrosion inhibiter;Chromate is applicable in pH range 6.5~9.0, and Quadrafos is applicable in pH range 6.0
~7.0, chromate-zinc salt is applicable in pH range 6.5~7.5, and molybdate is applicable in pH range 7.5~10.0, and silicate is applicable in
PH range 7.5~10.0, by the control of cold water water quality indicator pH value in the range of 7.0~9.0, in 25C, the water of PH=7
For neutrality, therefore the water of PH=7~9.2 generally belongs to neutral or subalkaline range, in general, in above-mentioned PH range
Interior, the corrosivity of cooling water declines with the rising of pH value, in the operational process of recirculated cooling water, if being added without sulfuric acid,
Then the pH value of cooling water can gradually rise to its natural equilibrium pH value, therefore, if cooling water needs be lower than its natural equilibrium
Run under conditions of pH value, then the pH value of the recirculating cooling water system needs to control by acid adding, it is ensured that heat transfer efficiency it is same
When, reduce the corrosivity of cooling water, it is ensured that the normal operation of crystallizer, to achieve the purpose that ensure heat transfer efficiency.
Embodiment two: steel-making crystallizer steel -passing amount deepens steel index control method, comprising the following steps:
1) control technology and equipment of cold water matter pH value index and conductivity indices, including water tower and monitor terminal, water tower
Inside be equipped with water quality monitor, water quality monitor directly contacts with the cold water in water tower and carries out real-time monitoring;
2) cold water matter pH value index control method, water quality monitor carry out real-time monitoring to cold water matter pH value, set in water tower
There is the input pipe for extending to cold water, carries out adjustment to pH value by the way that suitable corrosion inhibiter is added to input pipe inside;
3) inside of the conductivity indices control method of cold water matter, water tower is equipped with Conductivity controllers, water quality monitor pair
The conductivity of cold water matter carries out real-time monitoring, and cold water information is transmitted to monitor terminal by water quality monitor, eventually by control monitoring
End controls Conductivity controllers, adjusts the conductivity of cold water;
4) dummy bar running track controls, and bearing is installed in the outside activity of dummy bar, and the outer sheath of dummy bar is equipped with and axis
The stop collar of touching is accepted, stop collar follows the braking equipment of dummy bar to move horizontally together, the mistake that dummy bar relies on motor mobile
By the limit of stop collar in journey, the movement deviation of dummy bar can be reduced;
5) optimize crystallizer copper pipe coating and taper, increase copper tube inner lining coating, and optimize copper pipe parameter, it is anti-to increase copper pipe
Under the premise of abrasion, copper pipe resistance of billet withdrawal is controlled.
Step 1 water tower is crystallizer enclosed cooling column, and monitor terminal carries out manipulation supervision by staff.
The scope of application of step 2 corrosion inhibiter;Chromate is applicable in pH range 6.5~9.0, and Quadrafos is applicable in pH range
6.0~7.0, chromate-zinc salt is applicable in pH range 6.5~7.5, and molybdate is applicable in pH range 7.5~10.0, and silicate is suitable
With pH range 7.5~10.0, cold water water quality indicator pH range 7.0~9.0.
Step 3 Conductivity controllers calculate temperature-compensating using single-chip microcontroller digitlization, have high and low limit control relay defeated
It the functions such as shows with switching temperature out, is suitble to pure water manufacture, cooling water water tower.
Step 4 dummy bar rolls between moving process middle (center) bearing and stop collar, reduces between stop collar and dummy bar
Friction, reduces the abrasion of dummy bar, prevents dummy bar size because abrasion changes, cause to deviate, guarantee the movement of dummy bar
Error is in 5mm.
Controlled by dummy bar running track, bearing is installed in the outside activity of dummy bar, the outer sheath of dummy bar be equipped with
The stop collar of bearing touch, stop collar follow the braking equipment of dummy bar to move horizontally together, and dummy bar is by motor movement
In the process by the limit of stop collar, the movement deviation of dummy bar can be reduced, optimizes crystallizer copper pipe coating and taper, increases copper
Pipe liner coating, and optimize copper pipe parameter, under the premise of increase copper pipe is wear-resistant, copper pipe resistance of billet withdrawal is controlled, reduces stop collar
Friction between dummy bar reduces the abrasion of dummy bar, prevents dummy bar size because abrasion changes, and causes to deviate, and protects
The displacement error of dummy bar is demonstrate,proved in 5mm, to achieve the purpose that reduce copper pipe coating heel and toe wear.
The beneficial effects of the present invention are: pass through the control technology and equipment of cold water matter pH value index and conductivity indices, packet
Water tower and monitor terminal are included, the inside of water tower is equipped with water quality monitor, and water quality monitor directly contacts simultaneously with the cold water in water tower
Real-time monitoring is carried out, cold water matter pH value index control method, water quality monitor carries out real-time monitoring to cold water matter pH value, in water tower
Equipped with the input pipe for extending to cold water, adjustment to pH value, cold water are carried out by the way that suitable corrosion inhibiter is added to input pipe inside
The inside of the conductivity indices control method of matter, water tower is equipped with Conductivity controllers, conductivity of the water quality monitor to cold water matter
Real-time monitoring is carried out, cold water information is transmitted to monitor terminal by water quality monitor, is controlled by control monitor terminal conductivity
Device is controlled, and the conductivity of cold water, the scope of application of corrosion inhibiter are adjusted;Chromate is applicable in pH range 6.5~9.0, poly- phosphorus
Hydrochlorate is applicable in pH range 6.0~7.0, and chromate-zinc salt is applicable in pH range 6.5~7.5, and molybdate is applicable in pH range
7.5~10.0, silicate is applicable in pH range 7.5~10.0, the range by the control of cold water water quality indicator pH value 7.0~9.0
Interior, in 25C, the water of PH=7 is neutrality, therefore the water of PH=7~9.2 generally belongs to neutral or subalkaline range, generally
For, within the scope of above-mentioned PH, the corrosivity of cooling water declines with the rising of pH value, in the operational process of recirculated cooling water
In, if being added without sulfuric acid, the pH value of cooling water can gradually rise to its natural equilibrium pH value, therefore, if cooling water needs
It to be run under conditions of being lower than its natural equilibrium pH value, then the pH value of the recirculating cooling water system needs to control by acid adding
System, it is ensured that while heat transfer efficiency, reduce the corrosivity of cooling water, it is ensured that the normal operation of crystallizer, so that having reached ensures
The purpose of heat transfer efficiency is controlled by dummy bar running track, and bearing, the outer sheath of dummy bar are installed in the outside activity of dummy bar
Equipped with the stop collar with bearing touch, stop collar follows the braking equipment of dummy bar to move horizontally together, and dummy bar relies on motor
By the limit of stop collar in mobile process, the movement deviation of dummy bar can be reduced, optimizes crystallizer copper pipe coating and taper,
Increase copper tube inner lining coating, and optimize copper pipe parameter, under the premise of increase copper pipe is wear-resistant, controls copper pipe resistance of billet withdrawal, reduce
Friction between stop collar and dummy bar reduces the abrasion of dummy bar, prevents dummy bar size because abrasion changes, and causes partially
It moves, guarantees that the displacement error of dummy bar in 5mm, to achieve the purpose that reduce copper pipe coating heel and toe wear, solves
Continuous cast mold steel -passing amount determines the service life of copper pipe, and production cost can be reduced by promoting copper pipe steel -passing amount, while reduce knot
The replacement frequency of brilliant device, increase change the packet equipment repair and maintenance time and reduce personnel labor intensity, maximum promotion steel mill
Yield stablizes STEELMAKING PRODUCTION tissue, still has the problem of room for improvement.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (5)
1. making steel crystallizer steel -passing amount deepens steel index control method, which comprises the following steps:
1) control technology and equipment of cold water matter pH value index and conductivity indices, including water tower and monitor terminal, water tower it is interior
Portion is equipped with water quality monitor, and water quality monitor directly contacts with the cold water in water tower and carries out real-time monitoring;
2) cold water matter pH value index control method, water quality monitor carry out real-time monitoring to cold water matter pH value, are equipped with and prolong in water tower
The input pipe for extending to cold water carries out adjustment to pH value by the way that suitable corrosion inhibiter is added to input pipe inside;
3) inside of the conductivity indices control method of cold water matter, water tower is equipped with Conductivity controllers, and water quality monitor is to cold water
The conductivity of matter carries out real-time monitoring, and cold water information is transmitted to monitor terminal by water quality monitor, by controlling monitor terminal pair
Conductivity controllers are controlled, and the conductivity of cold water is adjusted;
4) dummy bar running track controls, and bearing is installed in the outside activity of dummy bar, and the outer sheath of dummy bar is equipped with to be connect with bearing
The stop collar of touching, stop collar follow the braking equipment of dummy bar to move horizontally together, during dummy bar is by motor movement
By the limit of stop collar, the movement deviation of dummy bar can be reduced;
5) optimize crystallizer copper pipe coating and taper, increase copper tube inner lining coating, and optimize copper pipe parameter, it is wear-resistant to increase copper pipe
Under the premise of, control copper pipe resistance of billet withdrawal.
2. steel-making crystallizer steel -passing amount according to claim 1 deepens steel index control method, it is characterised in that;Step
1 water tower is crystallizer enclosed cooling column, and monitor terminal carries out manipulation supervision by staff.
3. steel-making crystallizer steel -passing amount according to claim 1 deepens steel index control method, it is characterised in that;Step
The scope of application of 2 corrosion inhibiter;Chromate is applicable in pH range 6.5~9.0, Quadrafos be applicable in pH range 6.0~
7.0, chromate-zinc salt is applicable in pH range 6.5~7.5, and molybdate is applicable in pH range 7.5~10.0, and silicate is applicable in PH
It is worth range 7.5~10.0, cold water water quality indicator pH range 7.0~9.0.
4. steel-making crystallizer steel -passing amount according to claim 1 deepens steel index control method, it is characterised in that;Step
3 Conductivity controllers calculate temperature-compensating using single-chip microcontroller digitlization, have the control relay output of high and low limit and switching
The functions such as temperature display are suitble to pure water manufacture, cooling water water tower.
5. steel-making crystallizer steel -passing amount according to claim 1 deepens steel index control method, it is characterised in that;Step
4 dummy bars roll between moving process middle (center) bearing and stop collar, reduce the friction between stop collar and dummy bar, reduce
The abrasion of dummy bar prevents dummy bar size because abrasion changes, and causes to deviate, and guarantees the displacement error of dummy bar in 5mm
It is interior.
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CN112182852A (en) * | 2020-09-08 | 2021-01-05 | 山东莱钢永锋钢铁有限公司 | Method and device for predicting service life of crystallizer copper pipe |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN112182852A (en) * | 2020-09-08 | 2021-01-05 | 山东莱钢永锋钢铁有限公司 | Method and device for predicting service life of crystallizer copper pipe |
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